var log = require('hlogger').createLogger("monitor");



function ntokb(n) {
	var suffix = ["B","KB","MB","GB"];
	var si = 0;
	while( n> 1024 && si< suffix.length) {
		n/=1024;
		si++;
	}
	return n.toFixed(2) + " " +suffix[si];
}



var monitor = {

	bundleStart(context) {
		this.context = context;
		log.info("Bundle monitor started");
		this.registerCommands(context);
		context.on('hci-config', (config) => {
			context.on(config,"start",function() {
				config.test();
			});	
		});
	},
	registerCommands(context) {
		// listen from command from ourselves
		context.on('.*:cmd:stat',(args) => {
			/*var r = {
				numberOfModules: Object.keys(context.manager.registry).length,
				numberOfListeners: context.manager.events.listeners.length,
				listeners: context.manager.events.listeners.map((l) => l.name),
				memory: process.memoryUsage()
			}
			context.with('prettyjson').do((pj) => {
				log.info(pj.render(r));
			});*/
			this.showStat();
		});
		context.on('.*:cmd:gc',(args) => {
			gc();
		});
	},
	showStat() {
		var context = this.context;
		var obj = process.memoryUsage();
		log.info("Memory Rss: " + ntokb(obj.rss)
							 +" Total: " + ntokb(obj.heapTotal)
							 +" Used: " + ntokb(obj.heapUsed));
		log.info(
			"Modules registered: " + context.manager.stat.modulesRegistered,
			"Modules UnRegistered: " + context.manager.stat.modulesUnRegistered,
			"events emitted: " + context.manager.events.stat.emitted,
			"events called: " + context.manager.events.stat.called,
			"events tried: " + context.manager.events.stat.tried
		);
	},
	// Human readable stat
	getStat() {
		var obj = {};
		var mem = process.memoryUsage();

		obj.mem = {
			rss: ntokb(mem.rss),
			heapTotal: ntokb(mem.heapTotal),
			heapUsed: ntokb(mem.heapUsed),
		}
		return obj;
	}




};

module.exports = monitor;